R.h

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#include <grass/config.h>
#include <grass/gis.h>
#ifdef HAVE_GDAL
#include <gdal.h>
#endif

#define XDR_FLOAT_NBYTES 4
#define XDR_DOUBLE_NBYTES 8
#define NULL_ROWS_INMEM 8

/* if short is 16 bits, then
 *       short will allow 32767 cols
 *       unsigned short will allow 65536 cols
 * use int if you need more columns (but this will take more memory).
 *
 */
typedef int COLUMN_MAPPING;

struct GDAL_link
{
    char *filename;
    int band_num;
    DCELL null_val;
    int hflip;
    int vflip;
#ifdef HAVE_GDAL
    GDALDatasetH data;
    GDALRasterBandH band;
    GDALDataType type;
#endif
};

#ifdef HAVE_GDAL
extern CPLErr Rast_gdal_raster_IO(GDALRasterBandH, GDALRWFlag,
                                  int, int, int, int,
                                  void *, int, int, GDALDataType, int, int);
#endif

struct tileinfo         /* Information for tiles */
{
    char *name;                 /* Name of open file            */
    char *mapset;               /* Mapset of open file          */
    struct Cell_head cellhd;    /* Cell header                  */
    struct ilist *clist;        /* columns inside current region */
};

struct R_vrt
{
    int tilecount;
    struct tileinfo *tileinfo;
    struct ilist *tlist;
};

struct fileinfo                 /* Information for opened cell files */
{
    int open_mode;              /* see defines below            */
    struct Cell_head cellhd;    /* Cell header                  */
    struct Reclass reclass;     /* Table reclass                */
    struct Cell_stats statf;    /* Cell stats                   */
    struct Range range;         /* Range structure              */
    struct FPRange fp_range;    /* float Range structure        */
    int want_histogram;
    int reclass_flag;           /* Automatic reclass flag       */
    off_t *row_ptr;             /* File row addresses           */
    COLUMN_MAPPING *col_map;    /* Data to window col mapping   */
    double C1, C2;              /* Data to window row constants */
    int cur_row;                /* Current data row in memory   */
    int null_cur_row;           /* Current null row in memory   */
    int cur_nbytes;             /* nbytes per cell for current row */
    unsigned char *data;        /* Decompressed data buffer     */
    int null_fd;                /* Null bitmap fd               */
    unsigned char *null_bits;   /* Null bitmap buffer           */
    int nbytes;                 /* bytes per cell               */
    RASTER_MAP_TYPE map_type;   /* type: int, float or double map */
    char *temp_name;            /* Temporary name for NEW files */
    char *null_temp_name;       /* Temporary name for NEW NULL files */
    int null_file_exists;       /* for existing raster maps     */
    char *name;                 /* Name of open file            */
    char *mapset;               /* Mapset of open file          */
    int io_error;               /* io error warning given       */
    struct Quant quant;
    struct GDAL_link *gdal;
    int data_fd;                /* Raster data fd               */
    off_t *null_row_ptr;        /* Null file row addresses      */
    struct R_vrt *vrt;
};

struct R__                      /*  Structure of library globals */
{
    RASTER_MAP_TYPE fp_type;    /* type for writing floating maps */
    int mask_fd;                /* File descriptor for automatic mask   */
    int auto_mask;              /* Flag denoting automatic masking      */
    int want_histogram;
    int nbytes;
    int compression_type;
    int compress_nulls;
    int window_set;             /* Flag: window set?                    */
    int split_window;           /* Separate windows for input and output */
    struct Cell_head rd_window; /* Window used for input        */
    struct Cell_head wr_window; /* Window used for output       */

    int fileinfo_count;
    struct fileinfo *fileinfo;
};

extern struct R__ R__;          /* allocated in init */

#define OPEN_OLD              1
#define OPEN_NEW_COMPRESSED   2
#define OPEN_NEW_UNCOMPRESSED 3